$\left(4a-8\right)\left(a+9\right)$

$g=m\cdot y+\frac{a\cdot f^2}{2}$

$x^2-10>0$

$\int\frac{5x+10}{\left(x-2\right)\left(x-5\right)}dx$

$\left(\frac{2}{3^3}\right)x\left(\frac{2}{3}\right)^2$

$25kx^2-20kx+4k$

$\left(1+\sin\left(x\right)\right)^2-\left(1-\sin\left(x\right)\right)^2$